2012 | OriginalPaper | Buchkapitel
Dog Breed Classification Using Part Localization
verfasst von : Jiongxin Liu, Angjoo Kanazawa, David Jacobs, Peter Belhumeur
Erschienen in: Computer Vision – ECCV 2012
Verlag: Springer Berlin Heidelberg
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We propose a novel approach to fine-grained image classification in which instances from different classes share common parts but have wide variation in shape and appearance. We use dog breed identification as a test case to show that extracting corresponding parts improves classification performance. This domain is especially challenging since the appearance of corresponding parts can vary dramatically,
e.g.
, the faces of bulldogs and beagles are very different. To find accurate correspondences, we build exemplar-based geometric and appearance models of dog breeds and their face parts. Part correspondence allows us to extract and compare descriptors in like image locations. Our approach also features a hierarchy of parts (
e.g.
, face and eyes) and breed-specific part localization. We achieve 67% recognition rate on a large real-world dataset including 133 dog breeds and 8,351 images, and experimental results show that accurate part localization significantly increases classification performance compared to state-of-the-art approaches.